[thirdparty/glibc.git] / sysdeps / mach / hurd / bits / socket.h

/* System-specific socket constants and types.  Hurd version.
   Copyright (C) 1991-2021 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, see <https://www.gnu.org/licenses/>.  */

#ifndef __BITS_SOCKET_H
#define __BITS_SOCKET_H	1

#ifndef _SYS_SOCKET_H
# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
#endif

#define	__need_size_t
#include <stddef.h>

#include <bits/wordsize.h>
#include <sys/types.h>

/* Type for length arguments in socket calls.  */
#ifndef __socklen_t_defined
typedef __socklen_t socklen_t;
# define __socklen_t_defined
#endif


/* Types of sockets.  */
enum __socket_type
{
  SOCK_STREAM = 1,		/* Sequenced, reliable, connection-based
				   byte streams.  */
#define SOCK_STREAM SOCK_STREAM
  SOCK_DGRAM = 2,		/* Connectionless, unreliable datagrams
				   of fixed maximum length.  */
#define SOCK_DGRAM SOCK_DGRAM
  SOCK_RAW = 3,			/* Raw protocol interface.  */
#define SOCK_RAW SOCK_RAW
  SOCK_RDM = 4,			/* Reliably-delivered messages.  */
#define SOCK_RDM SOCK_RDM
  SOCK_SEQPACKET = 5,		/* Sequenced, reliable, connection-based,
				   datagrams of fixed maximum length.  */
#define SOCK_SEQPACKET SOCK_SEQPACKET

#define SOCK_MAX (SOCK_SEQPACKET + 1)
  /* Mask which covers at least up to SOCK_MASK-1.  The
     remaining bits are used as flags. */
#define SOCK_TYPE_MASK 0xf

  /* Flags to be ORed into the type parameter of socket and socketpair and
     used for the flags parameter of accept4.  */

  SOCK_CLOEXEC = 0x00400000,	/* Atomically set close-on-exec flag for the
				   new descriptor(s).  */
#define SOCK_CLOEXEC SOCK_CLOEXEC

  /* Changed from the O_NONBLOCK value (0x8, which is unusable for us as it is
     conflicting with the original SOCK_* flags' values) to the Linux value
     (04000).  TODO: is there a ``better'' value?  */
  SOCK_NONBLOCK = 0x0800	/* Atomically mark descriptor(s) as
				   non-blocking.  */
#define SOCK_NONBLOCK SOCK_NONBLOCK
};

/* Protocol families.  */
#define	PF_UNSPEC	0	/* Unspecified.  */
#define	PF_LOCAL	1	/* Local to host (pipes and file-domain).  */
#define	PF_UNIX		PF_LOCAL /* Old BSD name for PF_LOCAL.  */
#define	PF_FILE		PF_LOCAL /* POSIX name for PF_LOCAL.  */
#define	PF_INET		2	/* IP protocol family.  */
#define	PF_IMPLINK	3	/* ARPAnet IMP protocol.  */
#define	PF_PUP		4	/* PUP protocols.  */
#define	PF_CHAOS	5	/* MIT Chaos protocols.  */
#define	PF_NS		6	/* Xerox NS protocols.  */
#define	PF_ISO		7	/* ISO protocols.  */
#define	PF_OSI		PF_ISO
#define	PF_ECMA		8	/* ECMA protocols.  */
#define	PF_DATAKIT	9	/* AT&T Datakit protocols.  */
#define	PF_CCITT	10	/* CCITT protocols (X.25 et al).  */
#define	PF_SNA		11	/* IBM SNA protocol.  */
#define	PF_DECnet	12	/* DECnet protocols.  */
#define	PF_DLI		13	/* Direct data link interface.  */
#define	PF_LAT		14	/* DEC Local Area Transport protocol.  */
#define	PF_HYLINK	15	/* NSC Hyperchannel protocol.  */
#define	PF_APPLETALK	16	/* Don't use this.  */
#define	PF_ROUTE	17	/* Internal Routing Protocol.  */
#define	PF_LINK		18	/* Link layer interface.  */
#define	PF_XTP		19	/* eXpress Transfer Protocol (no AF).  */
#define	PF_COIP		20	/* Connection-oriented IP, aka ST II.  */
#define	PF_CNT		21	/* Computer Network Technology.  */
#define PF_RTIP		22	/* Help Identify RTIP packets.  **/
#define	PF_IPX		23	/* Novell Internet Protocol.  */
#define	PF_SIP		24	/* Simple Internet Protocol.  */
#define PF_PIP		25	/* Help Identify PIP packets.  */
#define PF_INET6	26	/* IP version 6.  */
#define	PF_MAX		27

/* Address families.  */
#define	AF_UNSPEC	PF_UNSPEC
#define	AF_LOCAL	PF_LOCAL
#define	AF_UNIX		PF_UNIX
#define	AF_FILE		PF_FILE
#define	AF_INET		PF_INET
#define	AF_IMPLINK	PF_IMPLINK
#define	AF_PUP		PF_PUP
#define	AF_CHAOS	PF_CHAOS
#define	AF_NS		PF_NS
#define	AF_ISO		PF_ISO
#define	AF_OSI		PF_OSI
#define	AF_ECMA		PF_ECMA
#define	AF_DATAKIT	PF_DATAKIT
#define	AF_CCITT	PF_CCITT
#define	AF_SNA		PF_SNA
#define	AF_DECnet	PF_DECnet
#define	AF_DLI		PF_DLI
#define	AF_LAT		PF_LAT
#define	AF_HYLINK	PF_HYLINK
#define	AF_APPLETALK	PF_APPLETALK
#define	AF_ROUTE	PF_ROUTE
#define	AF_LINK		PF_LINK
#ifdef __USE_MISC
# define	pseudo_AF_XTP	PF_XTP
#endif
#define	AF_COIP		PF_COIP
#define	AF_CNT		PF_CNT
#ifdef __USE_MISC
# define pseudo_AF_RTIP	PF_RTIP
#endif
#define	AF_IPX		PF_IPX
#define	AF_SIP		PF_SIP
#ifdef __USE_MISC
# define pseudo_AF_PIP	PF_PIP
#endif
#define AF_INET6	PF_INET6
#define	AF_MAX		PF_MAX

/* Maximum queue length specifiable by listen.  */
#define SOMAXCONN	128	/* 5 on the origional 4.4 BSD.  */

/* Get the definition of the macro to define the common sockaddr members.  */
#include <bits/sockaddr.h>

/* Structure describing a generic socket address.  */
struct sockaddr
  {
    __SOCKADDR_COMMON (sa_);	/* Common data: address family and length.  */
    char sa_data[14];		/* Address data.  */
  };


/* Structure large enough to hold any socket address (with the historical
   exception of AF_UNIX).  */
#if __WORDSIZE == 64
# define __ss_aligntype	__uint64_t
#else
# define __ss_aligntype	__uint32_t
#endif
#define _SS_PADSIZE \
  (_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))

struct sockaddr_storage
  {
    __SOCKADDR_COMMON (ss_);	/* Address family, etc.  */
    char __ss_padding[_SS_PADSIZE];
    __ss_aligntype __ss_align;	/* Force desired alignment.  */
  };


/* Bits in the FLAGS argument to `send', `recv', et al.  */
enum
  {
    MSG_OOB		= 0x01,	/* Process out-of-band data.  */
#define MSG_OOB MSG_OOB
    MSG_PEEK		= 0x02,	/* Peek at incoming messages.  */
#define MSG_PEEK MSG_PEEK
    MSG_DONTROUTE	= 0x04,	/* Don't use local routing.  */
#define MSG_DONTROUTE MSG_DONTROUTE
    MSG_EOR		= 0x08,	/* Data completes record.  */
#define MSG_EOR MSG_EOR
    MSG_TRUNC		= 0x10,	/* Data discarded before delivery.  */
#define MSG_TRUNC MSG_TRUNC
    MSG_CTRUNC		= 0x20,	/* Control data lost before delivery.  */
#define MSG_CTRUNC MSG_CTRUNC
    MSG_WAITALL		= 0x40,	/* Wait for full request or error.  */
#define MSG_WAITALL MSG_WAITALL
    MSG_DONTWAIT	= 0x80,	/* This message should be nonblocking.  */
#define MSG_DONTWAIT MSG_DONTWAIT
    MSG_NOSIGNAL	= 0x0400	/* Do not generate SIGPIPE on EPIPE.  */
#define MSG_NOSIGNAL MSG_NOSIGNAL
  };


/* Structure describing messages sent by
   `sendmsg' and received by `recvmsg'.  */
struct msghdr
  {
    void *msg_name;		/* Address to send to/receive from.  */
    socklen_t msg_namelen;	/* Length of address data.  */

    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
    int msg_iovlen;		/* Number of elements in the vector.  */

    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
    socklen_t msg_controllen;	/* Ancillary data buffer length.  */

    int msg_flags;		/* Flags in received message.  */
  };

/* Structure used for storage of ancillary data object information.  */
struct cmsghdr
  {
    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
				   of cmsghdr structure.  */
    int cmsg_level;		/* Originating protocol.  */
    int cmsg_type;		/* Protocol specific type.  */
#if __glibc_c99_flexarr_available
    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
#endif
  };

/* Ancillary data object manipulation macros.  */
#if __glibc_c99_flexarr_available
# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
#else
# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
#endif

#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)

#define CMSG_FIRSTHDR(mhdr) \
  ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)		      \
   ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) 0)

#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
			   & (size_t) ~(sizeof (size_t) - 1))
#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
			 + CMSG_ALIGN (sizeof (struct cmsghdr)))
#define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))

extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
				      struct cmsghdr *__cmsg) __THROW;
#ifdef __USE_EXTERN_INLINES
# ifndef _EXTERN_INLINE
#  define _EXTERN_INLINE __extern_inline
# endif
_EXTERN_INLINE struct cmsghdr *
__NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
{
  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
    /* The kernel header does this so there may be a reason.  */
    return (struct cmsghdr *) 0;

  __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
			       + CMSG_ALIGN (__cmsg->cmsg_len));
  if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control
					+ __mhdr->msg_controllen)
      || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
	  > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
    /* No more entries.  */
    return (struct cmsghdr *) 0;
  return __cmsg;
}
#endif	/* Use `extern inline'.  */

/* Socket level message types.  */
enum
  {
    SCM_RIGHTS = 0x01,		/* Access rights (array of int).  */
#define SCM_RIGHTS SCM_RIGHTS
    SCM_TIMESTAMP = 0x02,	/* Timestamp (struct timeval).  */
#define SCM_TIMESTAMP SCM_TIMESTAMP
    SCM_CREDS = 0x03		/* Process creds (struct cmsgcred).  */
#define SCM_CREDS SCM_CREDS
  };

#ifdef __USE_MISC
/* Unfortunately, BSD practice dictates this structure be of fixed size.
   If there are more than CMGROUP_MAX groups, the list is truncated.
   (On GNU systems, the `cmcred_euid' field is just the first in the
   list of effective UIDs.)  */
#define CMGROUP_MAX	16

/* Structure delivered by SCM_CREDS.  This describes the identity of the
   sender of the data simultaneously received on the socket.  By BSD
   convention, this is included only when a sender on a AF_LOCAL socket
   sends cmsg data of this type and size; the sender's structure is
   ignored, and the system fills in the various IDs of the sender process.  */
struct cmsgcred
  {
    __pid_t cmcred_pid;
    __uid_t cmcred_uid;
    __uid_t cmcred_euid;
    __gid_t cmcred_gid;
    int cmcred_ngroups;
    __gid_t cmcred_groups[CMGROUP_MAX];
  };
#endif

/* Protocol number used to manipulate socket-level options
   with `getsockopt' and `setsockopt'.  */
#define	SOL_SOCKET	0xffff

/* Socket-level options for `getsockopt' and `setsockopt'.  */
enum
  {
    SO_DEBUG = 0x0001,		/* Record debugging information.  */
#define SO_DEBUG SO_DEBUG
    SO_ACCEPTCONN = 0x0002,	/* Accept connections on socket.  */
#define SO_ACCEPTCONN SO_ACCEPTCONN
    SO_REUSEADDR = 0x0004,	/* Allow reuse of local addresses.  */
#define SO_REUSEADDR SO_REUSEADDR
    SO_KEEPALIVE = 0x0008,	/* Keep connections alive and send
				   SIGPIPE when they die.  */
#define SO_KEEPALIVE SO_KEEPALIVE
    SO_DONTROUTE = 0x0010,	/* Don't do local routing.  */
#define SO_DONTROUTE SO_DONTROUTE
    SO_BROADCAST = 0x0020,	/* Allow transmission of
				   broadcast messages.  */
#define SO_BROADCAST SO_BROADCAST
    SO_USELOOPBACK = 0x0040,	/* Use the software loopback to avoid
				   hardware use when possible.  */
#define SO_USELOOPBACK SO_USELOOPBACK
    SO_LINGER = 0x0080,		/* Block on close of a reliable
				   socket to transmit pending data.  */
#define SO_LINGER SO_LINGER
    SO_OOBINLINE = 0x0100,	/* Receive out-of-band data in-band.  */
#define SO_OOBINLINE SO_OOBINLINE
    SO_REUSEPORT = 0x0200,	/* Allow local address and port reuse.  */
#define SO_REUSEPORT SO_REUSEPORT
    SO_SNDBUF = 0x1001,		/* Send buffer size.  */
#define SO_SNDBUF SO_SNDBUF
    SO_RCVBUF = 0x1002,		/* Receive buffer.  */
#define SO_RCVBUF SO_RCVBUF
    SO_SNDLOWAT = 0x1003,	/* Send low-water mark.  */
#define SO_SNDLOWAT SO_SNDLOWAT
    SO_RCVLOWAT = 0x1004,	/* Receive low-water mark.  */
#define SO_RCVLOWAT SO_RCVLOWAT
    SO_SNDTIMEO = 0x1005,	/* Send timeout.  */
#define SO_SNDTIMEO SO_SNDTIMEO
    SO_RCVTIMEO = 0x1006,	/* Receive timeout.  */
#define SO_RCVTIMEO SO_RCVTIMEO
    SO_ERROR = 0x1007,		/* Get and clear error status.  */
#define SO_ERROR SO_ERROR
    SO_STYLE = 0x1008,		/* Get socket connection style.  */
#define SO_STYLE SO_STYLE
    SO_TYPE = SO_STYLE		/* Compatible name for SO_STYLE.  */
#define SO_TYPE SO_TYPE
  };

/* Structure used to manipulate the SO_LINGER option.  */
struct linger
  {
    int l_onoff;		/* Nonzero to linger on close.  */
    int l_linger;		/* Time to linger.  */
  };

#endif	/* bits/socket.h */
Commit	Line	Data
6960eb42	1	/* System-specific socket constants and types. Hurd version.
2b778ceb	2	Copyright (C) 1991-2021 Free Software Foundation, Inc.
6960eb42 TS	3
	4	This file is part of the GNU C Library.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public License as
	8	published by the Free Software Foundation; either version 2.1 of the
	9	License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; see the file COPYING.LIB. If
5a82c748	18	not, see <https://www.gnu.org/licenses/>. */
6960eb42 TS	19
	20	#ifndef __BITS_SOCKET_H
	21	#define __BITS_SOCKET_H 1
	22
	23	#ifndef _SYS_SOCKET_H
	24	# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
	25	#endif
	26
	27	#define __need_size_t
6960eb42 TS	28	#include <stddef.h>
6960eb42 TS	29
b38a42a0	30	#include <bits/wordsize.h>
01969395	31	#include <sys/types.h>
6960eb42 TS	32
	33	/* Type for length arguments in socket calls. */
	34	#ifndef __socklen_t_defined
	35	typedef __socklen_t socklen_t;
	36	# define __socklen_t_defined
	37	#endif
	38
	39
	40	/* Types of sockets. */
	41	enum __socket_type
	42	{
	43	SOCK_STREAM = 1, /* Sequenced, reliable, connection-based
	44	byte streams. */
	45	#define SOCK_STREAM SOCK_STREAM
	46	SOCK_DGRAM = 2, /* Connectionless, unreliable datagrams
	47	of fixed maximum length. */
	48	#define SOCK_DGRAM SOCK_DGRAM
	49	SOCK_RAW = 3, /* Raw protocol interface. */
	50	#define SOCK_RAW SOCK_RAW
	51	SOCK_RDM = 4, /* Reliably-delivered messages. */
	52	#define SOCK_RDM SOCK_RDM
	53	SOCK_SEQPACKET = 5, /* Sequenced, reliable, connection-based,
	54	datagrams of fixed maximum length. */
	55	#define SOCK_SEQPACKET SOCK_SEQPACKET
	56
	57	#define SOCK_MAX (SOCK_SEQPACKET + 1)
	58	/* Mask which covers at least up to SOCK_MASK-1. The
	59	remaining bits are used as flags. */
	60	#define SOCK_TYPE_MASK 0xf
	61
	62	/* Flags to be ORed into the type parameter of socket and socketpair and
	63	used for the flags parameter of accept4. */
	64
	65	SOCK_CLOEXEC = 0x00400000, /* Atomically set close-on-exec flag for the
	66	new descriptor(s). */
	67	#define SOCK_CLOEXEC SOCK_CLOEXEC
	68
	69	/* Changed from the O_NONBLOCK value (0x8, which is unusable for us as it is
	70	conflicting with the original SOCK_* flags' values) to the Linux value
	71	(04000). TODO: is there a ``better'' value? */
	72	SOCK_NONBLOCK = 0x0800 /* Atomically mark descriptor(s) as
	73	non-blocking. */
	74	#define SOCK_NONBLOCK SOCK_NONBLOCK
	75	};
	76
	77	/* Protocol families. */
	78	#define PF_UNSPEC 0 /* Unspecified. */
	79	#define PF_LOCAL 1 /* Local to host (pipes and file-domain). */
	80	#define PF_UNIX PF_LOCAL /* Old BSD name for PF_LOCAL. */
	81	#define PF_FILE PF_LOCAL /* POSIX name for PF_LOCAL. */
	82	#define PF_INET 2 /* IP protocol family. */
	83	#define PF_IMPLINK 3 /* ARPAnet IMP protocol. */
	84	#define PF_PUP 4 /* PUP protocols. */
	85	#define PF_CHAOS 5 /* MIT Chaos protocols. */
	86	#define PF_NS 6 /* Xerox NS protocols. */
	87	#define PF_ISO 7 /* ISO protocols. */
	88	#define PF_OSI PF_ISO
	89	#define PF_ECMA 8 /* ECMA protocols. */
	90	#define PF_DATAKIT 9 /* AT&T Datakit protocols. */
	91	#define PF_CCITT 10 /* CCITT protocols (X.25 et al). */
	92	#define PF_SNA 11 /* IBM SNA protocol. */
	93	#define PF_DECnet 12 /* DECnet protocols. */
	94	#define PF_DLI 13 /* Direct data link interface. */
	95	#define PF_LAT 14 /* DEC Local Area Transport protocol. */
96	#define PF_HYLINK 15 /* NSC Hyperchannel protocol. */
97	#define PF_APPLETALK 16 /* Don't use this. */
98	#define PF_ROUTE 17 /* Internal Routing Protocol. */
99	#define PF_LINK 18 /* Link layer interface. */
100	#define PF_XTP 19 /* eXpress Transfer Protocol (no AF). */
101	#define PF_COIP 20 /* Connection-oriented IP, aka ST II. */
102	#define PF_CNT 21 /* Computer Network Technology. */
103	#define PF_RTIP 22 /* Help Identify RTIP packets. **/
104	#define PF_IPX 23 /* Novell Internet Protocol. */
105	#define PF_SIP 24 /* Simple Internet Protocol. */
106	#define PF_PIP 25 /* Help Identify PIP packets. */
107	#define PF_INET6 26 /* IP version 6. */
108	#define PF_MAX 27
109
110	/* Address families. */
111	#define AF_UNSPEC PF_UNSPEC
112	#define AF_LOCAL PF_LOCAL
113	#define AF_UNIX PF_UNIX
114	#define AF_FILE PF_FILE
115	#define AF_INET PF_INET
116	#define AF_IMPLINK PF_IMPLINK
117	#define AF_PUP PF_PUP
118	#define AF_CHAOS PF_CHAOS
119	#define AF_NS PF_NS
120	#define AF_ISO PF_ISO
121	#define AF_OSI PF_OSI
122	#define AF_ECMA PF_ECMA
123	#define AF_DATAKIT PF_DATAKIT
124	#define AF_CCITT PF_CCITT
125	#define AF_SNA PF_SNA
126	#define AF_DECnet PF_DECnet
127	#define AF_DLI PF_DLI
128	#define AF_LAT PF_LAT
129	#define AF_HYLINK PF_HYLINK
130	#define AF_APPLETALK PF_APPLETALK
131	#define AF_ROUTE PF_ROUTE
132	#define AF_LINK PF_LINK
b38a42a0 ST	133	#ifdef __USE_MISC
	134	# define pseudo_AF_XTP PF_XTP
	135	#endif
6960eb42 TS	136	#define AF_COIP PF_COIP
6960eb42 TS	137	#define AF_CNT PF_CNT
b38a42a0 ST	138	#ifdef __USE_MISC
	139	# define pseudo_AF_RTIP PF_RTIP
	140	#endif
6960eb42 TS	141	#define AF_IPX PF_IPX
6960eb42 TS	142	#define AF_SIP PF_SIP
b38a42a0 ST	143	#ifdef __USE_MISC
	144	# define pseudo_AF_PIP PF_PIP
	145	#endif
6960eb42 TS	146	#define AF_INET6 PF_INET6
	147	#define AF_MAX PF_MAX
	148
	149	/* Maximum queue length specifiable by listen. */
	150	#define SOMAXCONN 128 /* 5 on the origional 4.4 BSD. */
	151
	152	/* Get the definition of the macro to define the common sockaddr members. */
	153	#include <bits/sockaddr.h>
	154
	155	/* Structure describing a generic socket address. */
	156	struct sockaddr
	157	{
	158	__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
	159	char sa_data[14]; /* Address data. */
	160	};
	161
	162
	163	/* Structure large enough to hold any socket address (with the historical
3375cfaf	164	exception of AF_UNIX). */
b38a42a0	165	#if __WORDSIZE == 64
6960eb42 TS	166	# define __ss_aligntype __uint64_t
	167	#else
	168	# define __ss_aligntype __uint32_t
	169	#endif
3375cfaf FW	170	#define _SS_PADSIZE \
3375cfaf FW	171	(_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))
6960eb42 TS	172
	173	struct sockaddr_storage
	174	{
	175	__SOCKADDR_COMMON (ss_); /* Address family, etc. */
6960eb42	176	char __ss_padding[_SS_PADSIZE];
3375cfaf	177	__ss_aligntype __ss_align; /* Force desired alignment. */
6960eb42 TS	178	};
	179
	180
	181	/* Bits in the FLAGS argument to `send', `recv', et al. */
	182	enum
	183	{
	184	MSG_OOB = 0x01, /* Process out-of-band data. */
	185	#define MSG_OOB MSG_OOB
	186	MSG_PEEK = 0x02, /* Peek at incoming messages. */
	187	#define MSG_PEEK MSG_PEEK
	188	MSG_DONTROUTE = 0x04, /* Don't use local routing. */
	189	#define MSG_DONTROUTE MSG_DONTROUTE
	190	MSG_EOR = 0x08, /* Data completes record. */
	191	#define MSG_EOR MSG_EOR
	192	MSG_TRUNC = 0x10, /* Data discarded before delivery. */
	193	#define MSG_TRUNC MSG_TRUNC
	194	MSG_CTRUNC = 0x20, /* Control data lost before delivery. */
	195	#define MSG_CTRUNC MSG_CTRUNC
	196	MSG_WAITALL = 0x40, /* Wait for full request or error. */
	197	#define MSG_WAITALL MSG_WAITALL
	198	MSG_DONTWAIT = 0x80, /* This message should be nonblocking. */
	199	#define MSG_DONTWAIT MSG_DONTWAIT
	200	MSG_NOSIGNAL = 0x0400 /* Do not generate SIGPIPE on EPIPE. */
	201	#define MSG_NOSIGNAL MSG_NOSIGNAL
	202	};
	203
	204
	205	/* Structure describing messages sent by
	206	`sendmsg' and received by `recvmsg'. */
	207	struct msghdr
	208	{
	209	void msg_name; / Address to send to/receive from. */
	210	socklen_t msg_namelen; /* Length of address data. */
	211
	212	struct iovec msg_iov; / Vector of data to send/receive into. */
	213	int msg_iovlen; /* Number of elements in the vector. */
	214
	215	void msg_control; / Ancillary data (eg BSD filedesc passing). */
	216	socklen_t msg_controllen; /* Ancillary data buffer length. */
	217
	218	int msg_flags; /* Flags in received message. */
	219	};
	220
	221	/* Structure used for storage of ancillary data object information. */
	222	struct cmsghdr
	223	{
	224	socklen_t cmsg_len; /* Length of data in cmsg_data plus length
	225	of cmsghdr structure. */
	226	int cmsg_level; /* Originating protocol. */
	227	int cmsg_type; /* Protocol specific type. */
cb765808	228	#if __glibc_c99_flexarr_available
6960eb42 TS	229	__extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data. */
	230	#endif
	231	};
	232
	233	/* Ancillary data object manipulation macros. */
cb765808	234	#if __glibc_c99_flexarr_available
6960eb42 TS	235	# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
	236	#else
	237	# define CMSG_DATA(cmsg) ((unsigned char ) ((struct cmsghdr ) (cmsg) + 1))
	238	#endif
	239
	240	#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
	241
	242	#define CMSG_FIRSTHDR(mhdr) \
	243	((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \
b38a42a0	244	? (struct cmsghdr ) (mhdr)->msg_control : (struct cmsghdr ) 0)
6960eb42 TS	245
	246	#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
	247	& (size_t) ~(sizeof (size_t) - 1))
	248	#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
	249	+ CMSG_ALIGN (sizeof (struct cmsghdr)))
	250	#define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
	251
	252	extern struct cmsghdr __cmsg_nxthdr (struct msghdr __mhdr,
	253	struct cmsghdr *__cmsg) __THROW;
	254	#ifdef __USE_EXTERN_INLINES
	255	# ifndef _EXTERN_INLINE
	256	# define _EXTERN_INLINE __extern_inline
	257	# endif
	258	_EXTERN_INLINE struct cmsghdr *
	259	__NTH (__cmsg_nxthdr (struct msghdr __mhdr, struct cmsghdr __cmsg))
	260	{
	261	if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
	262	/* The kernel header does this so there may be a reason. */
b38a42a0	263	return (struct cmsghdr *) 0;
6960eb42 TS	264
	265	__cmsg = (struct cmsghdr ) ((unsigned char ) __cmsg
	266	+ CMSG_ALIGN (__cmsg->cmsg_len));
	267	if ((unsigned char ) (__cmsg + 1) > ((unsigned char ) __mhdr->msg_control
	268	+ __mhdr->msg_controllen)
	269	\|\| ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
	270	> ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
	271	/* No more entries. */
b38a42a0	272	return (struct cmsghdr *) 0;
6960eb42 TS	273	return __cmsg;
	274	}
	275	#endif /* Use `extern inline'. */
	276
	277	/* Socket level message types. */
	278	enum
	279	{
	280	SCM_RIGHTS = 0x01, /* Access rights (array of int). */
	281	#define SCM_RIGHTS SCM_RIGHTS
	282	SCM_TIMESTAMP = 0x02, /* Timestamp (struct timeval). */
	283	#define SCM_TIMESTAMP SCM_TIMESTAMP
	284	SCM_CREDS = 0x03 /* Process creds (struct cmsgcred). */
	285	#define SCM_CREDS SCM_CREDS
	286	};
	287
b38a42a0	288	#ifdef __USE_MISC
6960eb42 TS	289	/* Unfortunately, BSD practice dictates this structure be of fixed size.
	290	If there are more than CMGROUP_MAX groups, the list is truncated.
	291	(On GNU systems, the `cmcred_euid' field is just the first in the
	292	list of effective UIDs.) */
	293	#define CMGROUP_MAX 16
	294
	295	/* Structure delivered by SCM_CREDS. This describes the identity of the
	296	sender of the data simultaneously received on the socket. By BSD
	297	convention, this is included only when a sender on a AF_LOCAL socket
	298	sends cmsg data of this type and size; the sender's structure is
	299	ignored, and the system fills in the various IDs of the sender process. */
	300	struct cmsgcred
	301	{
	302	__pid_t cmcred_pid;
	303	__uid_t cmcred_uid;
	304	__uid_t cmcred_euid;
	305	__gid_t cmcred_gid;
	306	int cmcred_ngroups;
	307	__gid_t cmcred_groups[CMGROUP_MAX];
	308	};
b38a42a0	309	#endif
6960eb42 TS	310
	311	/* Protocol number used to manipulate socket-level options
	312	with `getsockopt' and `setsockopt'. */
	313	#define SOL_SOCKET 0xffff
	314
	315	/* Socket-level options for `getsockopt' and `setsockopt'. */
	316	enum
	317	{
	318	SO_DEBUG = 0x0001, /* Record debugging information. */
	319	#define SO_DEBUG SO_DEBUG
	320	SO_ACCEPTCONN = 0x0002, /* Accept connections on socket. */
	321	#define SO_ACCEPTCONN SO_ACCEPTCONN
	322	SO_REUSEADDR = 0x0004, /* Allow reuse of local addresses. */
	323	#define SO_REUSEADDR SO_REUSEADDR
	324	SO_KEEPALIVE = 0x0008, /* Keep connections alive and send
	325	SIGPIPE when they die. */
	326	#define SO_KEEPALIVE SO_KEEPALIVE
	327	SO_DONTROUTE = 0x0010, /* Don't do local routing. */
	328	#define SO_DONTROUTE SO_DONTROUTE
	329	SO_BROADCAST = 0x0020, /* Allow transmission of
	330	broadcast messages. */
	331	#define SO_BROADCAST SO_BROADCAST
	332	SO_USELOOPBACK = 0x0040, /* Use the software loopback to avoid
	333	hardware use when possible. */
	334	#define SO_USELOOPBACK SO_USELOOPBACK
	335	SO_LINGER = 0x0080, /* Block on close of a reliable
	336	socket to transmit pending data. */
	337	#define SO_LINGER SO_LINGER
	338	SO_OOBINLINE = 0x0100, /* Receive out-of-band data in-band. */
	339	#define SO_OOBINLINE SO_OOBINLINE
	340	SO_REUSEPORT = 0x0200, /* Allow local address and port reuse. */
	341	#define SO_REUSEPORT SO_REUSEPORT
	342	SO_SNDBUF = 0x1001, /* Send buffer size. */
	343	#define SO_SNDBUF SO_SNDBUF
	344	SO_RCVBUF = 0x1002, /* Receive buffer. */
	345	#define SO_RCVBUF SO_RCVBUF
	346	SO_SNDLOWAT = 0x1003, /* Send low-water mark. */
	347	#define SO_SNDLOWAT SO_SNDLOWAT
	348	SO_RCVLOWAT = 0x1004, /* Receive low-water mark. */
	349	#define SO_RCVLOWAT SO_RCVLOWAT
	350	SO_SNDTIMEO = 0x1005, /* Send timeout. */
	351	#define SO_SNDTIMEO SO_SNDTIMEO
	352	SO_RCVTIMEO = 0x1006, /* Receive timeout. */
	353	#define SO_RCVTIMEO SO_RCVTIMEO
	354	SO_ERROR = 0x1007, /* Get and clear error status. */
	355	#define SO_ERROR SO_ERROR
	356	SO_STYLE = 0x1008, /* Get socket connection style. */
	357	#define SO_STYLE SO_STYLE
	358	SO_TYPE = SO_STYLE /* Compatible name for SO_STYLE. */
	359	#define SO_TYPE SO_TYPE
	360	};
	361
	362	/* Structure used to manipulate the SO_LINGER option. */
	363	struct linger
	364	{
	365	int l_onoff; /* Nonzero to linger on close. */
	366	int l_linger; /* Time to linger. */
	367	};
	368
	369	#endif /* bits/socket.h */